Whole Foods shares keep rising in bidding war speculation

(Reuters) - Whole Foods Market Inc shares added to their gains on Monday after Amazon.com Inc announced plans last week to buy the upscale grocer, with investors betting that rivals could step in to create a bidding war.

(Reuters) - Whole Foods Market Inc shares added to their gains on Monday after Amazon.com Inc announced plans last week to buy the upscale grocer, with investors betting that rivals could step in to create a bidding war.